Sahih Muslim | Book 8 | Hadith Number 3271

Narrated by Abu Huraira (Allah be pleased with him)
Abu Huraira (Allah be pleased with him) reported that Allah's Messenger (may peace be upon him) forbade a person to combine in marriage a woman and her father's sister, and a woman and her mother's sister. Ibn Shihab said: So we regarded the paternal aunt of her (wife's) father and the maternal aunt of her (wife's) father at the same level.